[LONGHAIR]

I couldn't find a decent picture, so I drew a quick little sketch. In the drawing the wishbone is red. It is nothing more than tubing with rod ends. You need brackets, similar to a 4-link, to mount it to the axle housing. A new crossmember goes between the frame rails. These points pivot up and down allowing for the suspension travel. The front point, the black line, is the "sliding" part. It allows the wishbone to change length as the suspension travels. This eliminates any binding from the mounting points having different lengths.

Theoretically it can mount either way...The single point could be on the axle housing and the other end on the crossmember. It could be mounted behind the axle too, wherever you have the most space for it. As I drew it, seems easiest to me. It uses most of the same space already needed for the rest of the suspension parts. Plus it is easier to weld the brackets to the housing instead of what would be a casting on most rear-ends.